T-Mobile 7T Conversion to International WITHOUT unlocked bootloader/SIM unlock!

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avaholic

Member
Oct 17, 2006
32
2
Arlington
OnePlus One
OnePlus 5
Yes. Use the official method of receiving the unlock code for your SIM and then using MSM tool --> unlock bootloader. Here are the steps.


Also take a persist backup if possible.
Thanks for the response. I don't care about backups as I'm still in the process of setting up this new device but how do I run a persist backup? The device I purchased was supposedly an unlocked T-Mobile device. When I place a different provider's SIM card in the phone, it recognizes it as an AT&T SIM without service so I'm pretty sure its already unlocked because it would have prompted me for an unlock code if it was LOCKED, correct? Is there an ADB or fastboot command that will confirm if its truly unlocked? If it IS already unlocked just use the MSM tool and proceed with the instructions? Thanks!
 

catharsis724

Senior Member
Dec 26, 2014
118
32
Thanks for the response. I don't care about backups as I'm still in the process of setting up this new device but how do I run a persist backup? The device I purchased was supposedly an unlocked T-Mobile device. When I place a different provider's SIM card in the phone, it recognizes it as an AT&T SIM without service so I'm pretty sure its already unlocked because it would have prompted me for an unlock code if it was LOCKED, correct? Is there an ADB or fastboot command that will confirm if its truly unlocked? If it IS already unlocked just use the MSM tool and proceed with the instructions? Thanks!
Unlocking networks and bands is not the same thing as the unlock token for bootloader. On a T-Mobile device if you try unlocking bootloader in fastboot without using this patched MSM tools you will be asked for one. Have a look at this thread for clarification.


After unlocking bootloader the "official way" you need to root, and then you can follow this to take persist backup.

 

KenMasters32

New member
Apr 9, 2021
1
0
I just purchased a T-Mobile branded OnePlus 7T and have StraightTalk as my provider. From what I've read, I would still need to follow all the steps outlined? I'm a bit confused on the T-Mobile unlocked sim part.
 

yingyucheng

Member
Apr 11, 2021
16
0
C:\Users\Richard Ying\Downloads\oneplus 7T\10.0.13-GLOBAL-OnePlus7TOxygen_14.O.19_OTA_019_all_2009281709_1026-FASTBOOT>flash-all
Do you want to wipe all the data ( Reccomended )[Y/N]?y
< waiting for any device >
Erasing 'userdata' OKAY [ 0.154s]
CreateProcess failed: %1 is not a valid Win32 application. (193)
fastboot: error: Cannot generate image for userdata
Sending 'boot_a' (98304 KB) OKAY [ 2.422s]
Writing 'boot_a' OKAY [ 0.376s]
Finished. Total time: 2.848s
Sending 'dtbo' (16384 KB) OKAY [ 0.406s]
Writing 'dtbo' OKAY [ 0.071s]
Finished. Total time: 0.520s
Sending 'modem_a' (165396 KB) OKAY [ 4.089s]
Writing 'modem_a' OKAY [ 0.726s]
Finished. Total time: 4.910s
Sending 'reserve' (250164 KB) OKAY [ 6.128s]
Writing 'reserve' FAILED (remote: '(reserve_a) No such partition')
fastboot: error: Command failed
Sending 'recovery' (98304 KB) OKAY [ 2.409s]
Writing 'recovery' OKAY [ 0.327s]
Finished. Total time: 2.776s
Rewriting vbmeta struct at offset: 0
Sending 'vbmeta' (8 KB) OKAY [ 0.011s]
Writing 'vbmeta' OKAY [ 0.002s]
Finished. Total time: 0.064s
Sending 'vbmeta_system' (4 KB) OKAY [ 0.008s]
Writing 'vbmeta_system' OKAY [ 0.003s]
Finished. Total time: 0.043s
Rebooting into fastboot OKAY [ 0.003s]
< waiting for any device >
 

Marley Booker

Member
Feb 7, 2017
14
3
I don't know what happened, it has been a long time since this process. At the time of flash the global rom, it always turns on like the T-mobile rom, I already updated the adb, the path is well written. I don't know why it doesn't work now. When unzipping the fastboot file into the adb folder, you pressed Skip when replacing the data. I don't know what's wrong
 

Travisopp

Member
Apr 14, 2021
5
0
Hi all, I've been trying to convert my TMO OP7TPRO for weeks now, with the help of this guide I've been able to go past the the critical flashing error, as of now it is on 10.0.39 bootloader unlocked and rooted, tried flashing the global fastboot rom of 10.0.13 multiple times today it led me to a bricked phone 3 times, i tried the all in one tool to flash the global 10.0.3 which got me to a mclaren boot did not brick or boot on t-mobile screen, the visible issue that i face while flashing the rom is OPPRODUCT no such partition, as of my observations opproduct gets flashed as op2 on the msm tool, so far ive tried almost all the guides that were available but i always end up bricking it any help would be appreciated.
Thanks
 

yuugen18

New member
Apr 14, 2021
1
0
Hi all, I've been trying to convert my TMO OP7TPRO for weeks now, with the help of this guide I've been able to go past the the critical flashing error, as of now it is on 10.0.39 bootloader unlocked and rooted, tried flashing the global fastboot rom of 10.0.13 multiple times today it led me to a bricked phone 3 times, i tried the all in one tool to flash the global 10.0.3 which got me to a mclaren boot did not brick or boot on t-mobile screen, the visible issue that i face while flashing the rom is OPPRODUCT no such partition, as of my observations opproduct gets flashed as op2 on the msm tool, so far ive tried almost all the guides that were available but i always end up bricking it any help would be appreciated.
Thanks
yeah mine too, i'm trying to sim unlock my 7t tmo phone but it seems that it not going to be easy, esp. if I have to do it myself
 

yonutz33

New member
Apr 23, 2021
4
0
Hi, i hope you can help.
When i try to Run MsmDownloadTool V4.0.exe i get the error message "Packed image does not exist!" ...
What am i doing wrong?
 

HueyT

Senior Member
Apr 3, 2014
3,873
1,853
New Albany, IN
C:\Users\Richard Ying\Downloads\oneplus 7T\10.0.13-GLOBAL-OnePlus7TOxygen_14.O.19_OTA_019_all_2009281709_1026-FASTBOOT>flash-all
Do you want to wipe all the data ( Reccomended )[Y/N]?y
< waiting for any device >
Erasing 'userdata' OKAY [ 0.154s]
CreateProcess failed: %1 is not a valid Win32 application. (193)
fastboot: error: Cannot generate image for userdata
Sending 'boot_a' (98304 KB) OKAY [ 2.422s]
Writing 'boot_a' OKAY [ 0.376s]
Finished. Total time: 2.848s
Sending 'dtbo' (16384 KB) OKAY [ 0.406s]
Writing 'dtbo' OKAY [ 0.071s]
Finished. Total time: 0.520s
Sending 'modem_a' (165396 KB) OKAY [ 4.089s]
Writing 'modem_a' OKAY [ 0.726s]
Finished. Total time: 4.910s
Sending 'reserve' (250164 KB) OKAY [ 6.128s]
Writing 'reserve' FAILED (remote: '(reserve_a) No such partition')
fastboot: error: Command failed
Sending 'recovery' (98304 KB) OKAY [ 2.409s]
Writing 'recovery' OKAY [ 0.327s]
Finished. Total time: 2.776s
Rewriting vbmeta struct at offset: 0
Sending 'vbmeta' (8 KB) OKAY [ 0.011s]
Writing 'vbmeta' OKAY [ 0.002s]
Finished. Total time: 0.064s
Sending 'vbmeta_system' (4 KB) OKAY [ 0.008s]
Writing 'vbmeta_system' OKAY [ 0.003s]
Finished. Total time: 0.043s
Rebooting into fastboot OKAY [ 0.003s]
< waiting for any device >
Needs to enter fastbootD by typing "fastboot reboot fastboot". Then "flash-all"
 

HueyT

Senior Member
Apr 3, 2014
3,873
1,853
New Albany, IN
Hi all, I've been trying to convert my TMO OP7TPRO for weeks now, with the help of this guide I've been able to go past the the critical flashing error, as of now it is on 10.0.39 bootloader unlocked and rooted, tried flashing the global fastboot rom of 10.0.13 multiple times today it led me to a bricked phone 3 times, i tried the all in one tool to flash the global 10.0.3 which got me to a mclaren boot did not brick or boot on t-mobile screen, the visible issue that i face while flashing the rom is OPPRODUCT no such partition, as of my observations opproduct gets flashed as op2 on the msm tool, so far ive tried almost all the guides that were available but i always end up bricking it any help would be appreciated.
Thanks
"fastboot reboot fastboot" to enter fastbootD mode before can flash main system files
 

Travisopp

Member
Apr 14, 2021
5
0
"fastboot reboot fastboot" to enter fastbootD mode before can flash main system files
so after browsing xda for a week i was able to get to know that a mclaren edition TMO (HD1925) cant be re-branded, is there any way to covert it into a regular oneplus7t pro to change the device version. I really have been trying to get it done, so far the only hope is lineageOS for android 11. TMO just released android 11 for the rest of the OP7 series and there is no update on the mclaren.
 

yonutz33

New member
Apr 23, 2021
4
0
You must unzip the rom img file into same folder as msmtool folder
Well it seems like the issue came from my Anti-Virus, once i disabled and closed it everything worked fine!
Your help is also appreciated, i need it in the same folder for the next step to work, thank you.
 

yonutz33

New member
Apr 23, 2021
4
0
I do not understand the last step. Everything worked as described until this step.

What do i have to do to "update my fastboot executable"? Could someone tell me the what commands i need to execute to achieve this?
Guide only says
Update your fastboot executable, otherwise you'll encounter errors and modem issues. Download it here: ...
I'm afraid to move forward since i don't want to encounter "errors and modem issues" as stated above ...
 

HueyT

Senior Member
Apr 3, 2014
3,873
1,853
New Albany, IN
I do not understand the last step. Everything worked as described until this step.

What do i have to do to "update my fastboot executable"? Could someone tell me the what commands i need to execute to achieve this?
Guide only says
Update your fastboot executable, otherwise you'll encounter errors and modem issues. Download it here: ...
I'm afraid to move forward since i don't want to encounter "errors and modem issues" as stated above ...
Needs latest android fastboot files, but if everything is flashing then don't worry about it
 

yingyucheng

Member
Apr 11, 2021
16
0
Needs to enter fastbootD by typing "fastboot reboot fastboot". Then "flash-all"
I did type "fastboot reboot fastboot" and the phone reboots and goes into two chinese and one English selection screen, the same screen as I press down vol + power buttom. I selected english ->advanced -> fastboot and flash-all still failed the same way as before. Did I do anything wrong? Thanks.
 

HueyT

Senior Member
Apr 3, 2014
3,873
1,853
New Albany, IN
I did type "fastboot reboot fastboot" and the phone reboots and goes into two chinese and one English selection screen, the same screen as I press down vol + power buttom. I selected english ->advanced -> fastboot and flash-all still failed the same way as before. Did I do anything wrong? Thanks.
Yes, even though the 2 screens r identical in appearance, the first one was fastbootD and allow u to flash the important system files. The button combo 2nd screen was just stock recovery and can't flash anything--only to reboot into normal fastboot which allows flashing boot, recovery, vbmeta, etc.
 

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  • 12
    Here is a patched MSM download tool for TMobile OP7T.
    It will bypass the need to sim unlock before unlocking the bootloader, and will also bypass the need of an unlock token file from OnePlus (hence skip the wait period of 1 week to get the privilege to unlock). It will NOT sim unlock the phone.

    1) Download the patched MSM download tool: https://drive.google.com/file/d/12y3lO0wIgb2_LSDeVw9x_2C_HjbgZlb_/view?usp=sharing

    2) Run the tool, connect your phone in EDL mode (see below how to do it if you don't know), ensure the "sha256 check" is NOT checked, click the Start button and wait until it's completed.

    3) The phone will show a red warning saying "device is corrupt", just ignore that and wait some time. It will fallback in fastboot because it's not able to boot. Now run the following fastboot command:
    Code:
    fastboot flashing unlock_critical

    4) Bootloader is now unlocked. Update your fastboot executable, otherwise you'll encounter errors and modem issues. Download it here: https://dl.google.com/android/repository/platform-tools-latest-windows.zip. Then boot the phone in fastboot mode, and follow the steps 7, 8 and 9 of this nice guide : https://forum.xda-developers.com/oneplus-7t/how-to/guide-t-mobile-brand-conversion-to-t4019495


    How to enter EDL mode:
    [...] Getting into EDL mode took me a while because I'd never had to do that on any previous phone way back when I used custom ROMs. Note that in EDL mode the screen is blank, and apparently it times out after 10 seconds. So the way to do it is to power off the phone and disconnect the USB if it's connected. Then press both volume UP and DOWN at same time, then while holding those buttons down, insert the USB which should already be connected to your computer. The best way would be to have the MSM program already open on your PC, then put phone into ELD mode. I had my left hand holding the volume buttons on the phone (press hard with two fingers to be sure), used right hand to plug in USB, then right hand on the mouse to work MSM. Once the USB is plugged in, watch the MSM window and look for it to say "Connected". Then just click the Start button. You can then release the volume buttons on the phone and let MSM do its thing. [...]
    3
    so I'm gonna write my own summary hoping it fills any gaps. thanks to everyone else for providing very useful information and thanks to OP for putting in the work for figuring this out.

    1. first and foremost, make sure all of your drivers are correct. this is a must. boot into fastboot and EDL modes and check your device manager to make sure their drivers are properly installed. I had issues with getting the fastboot driver to work on my desktop but was picked up easily on my laptop. i still ended up pursuing fixing the driver on the desktop but no drivers from anywhere would work. i ended up going into windows update and installing the optional driver updates--some of these might be named samsung, but install any that sound related to android. this finally fixed the fastboot driver error on my desktop. the fastboot driver on my device manager was called "kedacom USB device">android bootloader interface

    2. I used the "all in one tool" available on this forum to get into EDL mode but you can do it manually too, it's not hard. as mentioned before, you will need to hold down the buttons then click start in MSM. If you release the volume buttons early it will kick you out of EDL--well at least for me. you can release the buttons once MSM starts. MSM took me about 130 seconds. This was over USB 3.0 port. I had no issue with USB 3.0 ports throughout the process but YMMV. At the end, it will give you a bootloader unlock menu and ask whether to unlock it or not. no one mentioned it before, but you have to manually click yes to unlock it. you will be kicked back into fastboot mode with the bootloader status as unlocked.

    3. I downloaded 10.0.9 global rom package, because i'm planning to relock the bootloader after. if you plan to keep bootloader unlocked just update to latest zip available. if you're planning to relock, make sure the zip isn't the latest version as you won't be able to OTA update from the OS if it's latest version (until there's another update). Copy the contents of the global rom zip into your ADB folder. The ADB tools inside the global rom zip might be older so I decided to keep the files in the ADB folder as is (i.e. the ones linked in OP) and not overwrite with the ADB files from the global rom zip. I went to CMD into the adb folder and ran the flash bat command. The first time it went to the "waiting for device" stage but did not go back into fastboot mode to continue, instead went to pink TMO bootscreen and eventually into the OS. I manually went back into fastboot mode via recovery mode and tried again. This time it went through it all (ignore the errors as mentioned in the CMD screen)

    You're done here if you want to keep the bootloader unlocked

    4. If you plan to relock bootloader, go into settings menu and look for update. you should get one, download it and install it. Once installed, factory reset and let it boot into OS. Then go into fastboot mode and relock bootloader with commands below

    check to make sure phone is being picked up by bootloader

    Code:
    fastboot devices

    command to relock bootloader

    Code:
    fastboot oem lock

    I went back into the fastboot menu to make sure it's locked and did another factory reset

    I can confirm that play store shows as certified and google pay cards can be added but I have not confirmed anything beyond that or checked netflix

    i hope this helps somewhat, good luck!
    2
    Tested, 100% working.
    No risks, if there is an error you can just flash the stock TMO msm and you'll be 100% stock and working.
    This is to bypass the need to sim unlock and to bypass the wait period of OnePlus. But this does not sim unlock the phone.

    Confirmed! Presently bootloader unlocked and global rom installed. Will receive my unlock token on Friday......hee hee.
    Wanted to say thank you for putting this together and making it dummy proof.
    2
    Did you reopen another cmd to do this? When I restart my phone into fastboot, Powershell continued to do its thing until my phone restarted and it got stuck.

    I'll have to find another computer to try if that's not the case

    No, I did not.

    From what I understand, in some cases, you need to do the flash-all.bat twice, not sure if it's a bug or a feature. Long store short, use flash-all.bat command to flash the rom into the phone, then the phone restart into the pink T-Mobile screen, shut down the phone, restart it into fastboot, then use Flash-all.bat command again, and this time the phone will restart into the fastbootd mode(not sure what it's called) basically a screen looks like this "简体中文 繁體中文 English", if you see this screen, you're half way done, wait here until the CMD/powershell flash all the ROM into the phone, then the phone will restart, and voila.

    PS: if you want to relock the bootloader, you need to flash the 10.0.8 or early version, then use the OTA update to update to the latest version, then do a factory rest, and then use command to lock the phone, otherwise, you will face a software brick, which you have to redo every steps.

    I used CMD to do everything, powershell should do the same, and I was unable to pass the pink screen as you in my Desktop running Windows 10 LTSC, but I was able to flash my phone in an old ThinkPad laptop running windows 7 pro.

    So, in your case, I assume it's system related issue, if you did every steps correct. and the only solution would be try it in other computer.

    Hope this helps
    2
    I'm not sure. In my case, I had a driver that appeared to be correct but the MSM tool would just hang. If you have the phone running in edl mode you could check the driver version in device manager but I'm not sure how to verify which one is the correct one.

    This is the driver I ended up using.

    https://drive.google.com/file/d/0B0Fg_uwj-hWoYndYTTMwQUZ2RlU/view

    In addition, you'll need these drivers for windows too, in order for the phone to be recognized when it reboots into fastbootD.


    FastbootD is when the phone reboots for the firsttime after you run flash-all.bat, you get the screen saying hold the power button to pause booting, and then it brings you to the screen with the oneplus logo, and 3 language choices. Without these drivers it never gets recognized and can't continue.

    Between the OPS instructions and the ones posted by Vallan, i was able to do this yesterday on the Tmobile unlocked sim phone that b&h had for 299 on Black friday, works great and it auto updated itself to the latest OTA from oneplus. After doing that update, do a factory reset on it and then you can re-lock your bootloader if you want to.
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